The structure of permetin A, a new polypeptin type antibiotic produced by Bacillus circulans.

@article{Takeuchi1979TheSO,
  title={The structure of permetin A, a new polypeptin type antibiotic produced by Bacillus circulans.},
  author={Yoshimi Takeuchi and Akio Murai and Yoshifumi Takahara and Masatsune Kainosho},
  journal={The Journal of antibiotics},
  year={1979},
  volume={32 2},
  pages={121-9}
}
The structure of permetin A(I), an antibiotic substance produced by Bacillus circulans AJ 3902, has been elucidated as a cyclic acyl peptide by means of the mass and nuclear magnetic resonance spectroscopic techniques. (Formula: see text.) The structure was found to be the same as polypeptin A(II) except that L-Thr in II is replaced by L-Ser in I. Details of the structural determination are given for the permetin A itself as well as for the hydrolyzed permetin A. (Formula: see text.) 
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